Re: general protection fault in vb2_mmap

[syzbot]

syzbot suspects this bug was fixed by commit:

commit cd26d1c4d1bc947b56ae404998ae2276df7b39b7
Author: Hans Verkuil <hverkuil@xxxxxxxxx>
Date:   Tue Nov 13 14:06:46 2018 +0000

    media: vb2: vb2_mmap: move lock up

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=101a70e2600000
start commit:   e12e00e3 Merge tag 'kbuild-fixes-v4.20' of git://git.kerne..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=8f215f21f041a0d7
dashboard link: https://syzkaller.appspot.com/bug?extid=52e5bf0ebfa66092937a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14c61b0b400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=109d545d400000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: media: vb2: vb2_mmap: move lock up

For information about bisection process see: https://goo.gl/tpsmEJ#bisection